Muffler for steam valves



(No Model.) 2 Sheets-Sheet 1. V

T. E. HILL.

MUFFLER FOR STEAM VALVES. No. 342,962. Patented June 1, 1886.

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(No Model.) 2 Sheet -Sheet 2. T. E. HILL.

MUFFLER FOR STEAM VALVES. No. 342,962. Patented June 1, 1886.

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.hincd with a safety-valve.

UNITED STATES PATENT OFFICEQ TllOMAS ENGLISH HILL, OF RAHVAY, NEXVJERSEY.

MUFFLER FOR STEAM-VALVES.

Application tiled February 16, 1886. Serial No. 192,118.

To aZZ 107mm it may concern:

Be it known that I, THOMAS ENGLISH HILL, of Rah way, in the county ofUnion and State of New Jersey, have invented a new and Improved Mufllcrfor Steam-Valves, ofwhich the following is a full, clear, and exact description.

The object of my invention is to provide an improved muiller or devicefor deadening or preventing the unpleasant hissing sound incident toescape of exhaust steam from the valves of steam engines as ordinarilycon- Structcd;

The invention is embodied in the construction and combination of partshereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure l is a sectional elevation of my new and improved mnfllcr,showing the same com- Fig. 2 is a section- 21 plan view of the same,taken on the lines as of Fig. 1; and Fig. 8 is a plan view of the innerlever for relieving the valve of pressure.

A represents the main casting of the muffler. This is formed with theouter upwardlyprojecting circular casing, B, and with theinnerupwardlyprejecting concentric flanges or platcs,O D, which f'll'lll theannular chambers E F, and central circular chamber, G.

In the central open'ng, H, of the casting A is fitted the valve I, whichforms the bottom (f the central chamber, G. The valve I is held down toits scat against the pressure of steam by the action of thespring J,which acts between the plate K (which is held down by the heavy bolt L)and the bottom of the circular box M, which is formed or provided withthe point a, which enters a centering- SOOliGl) in the top of the valveI, as shown clearly in Fig.1.. The box M is of smaller diameter than thechamber G, Formed by the flange D, so that an annular space is left between theadjacent surfaces of the said box and :llange, into which steamescaping from the Valve I first enters, and the upper edge of the box Mhas connected to it the shell N, which surrounds the bolt L loosely andreaches up through the deflector l", and is provided at .LCIEICATIONforming part of Letters Patent No. 342,962, dated June 1, 1886.

(No model.)

in this instance the deflector is formed with two downwardly-proj ectingconcentric flanges, PP. These are of such diameters respectivelyrclatively to the diameters of the flanges D C and main outer casing,13, that they are adapted to plunge into the chamber E F and occupy aposition about midway between the adjacent walls of the flanges G D andO B, respectively, as shown in Fig. 1. The flanges P P form a centralchamber, R, in the deflector, and also a surrounding annular chamber,It. The former incloses the central circular flange, D, and coversentirely the chamber G, while the former (the chamber R) incloses theflange C, so that when steam escapes from the valve I and issues fromthe chamber G it will be deflected downward and compelled to travelunder the flanges P P and over the flange G, entering at each turnchambers of gradually-increasing size, so the steam is not onlycompelled to travel a circuitous course, but is diffused in the chambersand its pressure reduced.

The deflector P is braced by the studs S S, which depend from the topplate, T, and the inner lever, Q, is fulcrumed to the stud S, and islinked to the outer lever, Q, by the link Q, so that any downwardmovement of the lever Q, will lift the lever Q, and cause it in turn tolift the shell N and box M, as above described.

The top plate, T, is bolted to the upper edge of the casing 13 of themain casting, and it is formed with numerous holes,c c,through which thesteam must pass, and which divide it up into small jets. The uppersurface of the plate T is formed with the radialribsccforstrengthening'it, and the central aperture,f,of the plate T isscrew-threaded to receive the screwthreaded upper portion, 2,01 theheavy bolt L, so that by turning the bolt L it may be longitudinallyadjusted for. regulating the pressure of the spring J upon the valve I.

The two jam-nuts m are placed upon the l L, and the levers for liftingthe box M, snb

bolt L above the plate T for locking the bolt,

and over these and the top of the boltis placed the cap U, to protectthe nuts and bolt, and

5 this cap is perforated to permit the escape of anv steam that mayenter it.

Havingthus described my invention, I claim as new and desire to secureby Letters Patent-- 1. The main casting A, formed with the IO casing Band flanges O D, and the dome P,

formed with flanges P P, in combination with the valve I, box M, springJ, casing N, bolt stantially as and for the purposes set forth.

2. The combination, with the main casting 15 having annular chambers,and the central chamber, G, of the valve I, and the box M, for inclosingthe spring within the central chamber, G, substantially as described.

THOMAS ENGLISH HlLL.

